Trolley-clamp.



H. P. DAVIS.

TROLLEY CLAMP.

APYLIQATION FILED OCT. 5, 1907.

Patented Aug. 17, 1909.

INVENTOR I AfTORNEY I WITNESSES:

5 M (B Hm- UNITED STATES PATEN enrich.

HARRY P. DAVIS, OF PITTSBURG, PENNSYLVANIA, ASSIGNORTO WESTINGHOU SEELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLYANIA,

TROLLEY-GLAMP.

Specification of Letters Patent.

Patented Aug. 17, 19013.

Application filed October 5, 1907. Serial No. 396,027.

} porting trolley conductors or other wires or cables as to be free fromdanger of accidental displacement.

My clamping device is specially adapted for use with grooved trolleyconductors that are suspended from messenger wires or cables, but it maybe employed in connection with conductors of circular cross-section thatare supported from bracket arms or crosswires, in accordance with a wellknown prac lice for low potential lines.

Figure 1, of the accompanying drawings is a front elevation, and Fig. 2is an end clc 'ation, of :1V trolloy-couductor hanger having a clampconstructed in accordance with my invention. Figs. 3 and 4: are detailviews of the trolley-conductor clamp shown in Figs. 1 and 2, and Fig. 5is a sectional View on line VV of Fig. '1.

Referring to the drawings, a trolley conductor 1 is suspended from amessenger wire or cable 2 by means of a hanger rod 3, a

cable clamp 4t and a .trolle -conductor clamp The cable clamp 4comprises a loop 6 which surrounds the cable 9. and is provided with apair of cars 7, the upper end, of the conncctmgrod 3 being flattened tofit between the cars 7 and being secured in position by means of a bolt8.

The trolley-cowluclor clamp 5 comprises two intercluingeable members S),a clamping block 14. and a nut 15. Each member 9 com-- prises a jaw 10which engages a groove ll in the trolley conductor 1, parallel side bars12 and a semi-annular collar segment 13. The lower end of the rod 3 isscrew-threaded to receive the nut- 15 and the upper end of the clampingblock 1 1 is provided with a recess to receive the extremity of saidrod. The inombers l) are provided with complementary projections 16having inclined outer faces which are engaged by the walls of a V-shapcdgrorno IT in the lower end of the clamping block 14 when the parts ofthe clamp are assembled. The jaws 10 of the members-9 are preferablymade of considerable length in order to avoid kinking the wire 1 and thecollar segments 13 are adapt ed to engage an annular groove 18 in thenut- 15. The clamping block 14L is provided with guide projections 19which extend in opposite directions from opposite sides to engage therespective side bars 12 and thereby hold the block in position.

In assembling the clamp members, the jaws 10 are held in engagement withthe grooves 11 in the trolley conductor, with the members 9, 1e: and 15located as above indicated and a clamping action is produced between thejaws by turning the nut 15 and thus forcing the members 9 and the block1st in opposite'directions The downward movement of the block 1% causesthe walls of the groove 17 to force the projections 16 toward each otherand thus seat the jaws 10 securely against the conductor 1.

It will be observed that the length of the hanger or the distancebetween the cable and the trolley conductor may be varied by usingblocks 14 of different lengths or havlng recesses of different depths,since the lower end of the hanger rod is screwthreaded for aconsiderable distance, and, furthermore, the trolley conductor may. bereleased from the hanger without disturbing the messenger clamp.These-features are of special advantage in practice.

I desire it to be understood that variations in size and arrangement ofdetails are within the spirit and scope of my invention.

Iclaim as my invention:

1. A trolley-conductor hanger comprising a rod, interchangeable jawmembers having wedge projections adjacent to the lower ends and upwardlyprojecting side bars, a clamping block located between said side barsand having laterally projecting arms to engage the outer side facesthereof and means to engage the outer faces of the wedge projections,and means cooperating with the hanger rod to effect opposing verticalmovements of the jaw members and the clamping block.

2. A trolley'conductor hanger comprising a rod, interchangeable membershaving aws and complementary wedge projections contiguous to the jaws, aclamping block having a groove to engage the wedge pro ecgroove toreceive the collar segments of the tions, and means for drawing thewedge projections into the groove to produce a clamping action betweenthe jaws. 3. A trolley-conductor hanger comprising a rod, the lower endof which is screwthreaded, interchangeable body members having jaws attheir lower ends and complementary collar segments at their upper endsand provided with complementary projections having inclined outer faces,a clamping block having a groove the walls of which engage the inclinedfaces of said projections, and provided with guide projections to engagethe sides of the body members, and a nut on the hanger rod having anannular i body members. I

l. A trolley-comtluctor hanger comprising a rod, interchangeable bodymembers the upper ends of which embrace the lower end of i said rod andthe lower ends of which have jaws to engage the trolley conductor andwedge projections, a clamping block having arms for holding the bodymembers in position, and means for engaging said wedge projections, andmeans for forcing the clamping block and the body members in j hangerrod and opposite directions to clamp the jaws to the trolley conductor.

5. The combination with a hanger rod having a circmnferentially groovednut on its lower end, and body members the upper ends of which engagethe groove in said nut and the lower ends of which are provided withclamping position to be engaged by the end of the having .means fordrawing the jaws toward each other when moved longitudinally downward.

(i. A conductor hanger comprising a rod, a pair of interchangeable bodymembers having wedge projections and jaws at their lower ends, aclamping block having arms for supporting the body members, and meansfor forcing said block into engagement with j the wedge projections.

In testimony whereol l have hereunto subscribed my name this 27th day ofSeptember, .H UT.

CAROLINE l). Sun-111s, lhnxm' llixns.

jaws, of a clamping block in

